How to get the current_user in a model observer?

Question

Given the following models:

Room (id, title)
RoomMembers (id, room_id)
RoomFeed, also an observer

When a Room title is updated, I want to c

Answer 1

This is a typical "separation of concern" issue.

The current_user lives in the controller and the Room model should know nothing about it. Maybe a RoomManager model could take care of who's changing the name on the doors...

Meanwhile a quick & dirty solution would be to throw a (non persistant) attribute at Room.rb to handle the current_user....

# room.rb
class Room
  attr_accessor :room_tagger_id
end

and pass your current_user in the params when updating @room.

That way you've got the culprit! :

def after_update(record)
   # record is the Room object
   current_user = record.room_tagger_id
end